muller has the latest. >> john, what is going on? >> all right, lara, this comes as a bit of a surprise. she introduced him to her parents. he bought her a ring as a gift. but this pop power couple appear to have grown apart. ♪ on the concrete falling from cloud nine ♪ >> it appears pop princess katy perry and singer/songwriter john mayer have fallen off cloud nine. after just seven months, the duo appear to have split again possibly explaining this cryptic frustrated tweet from perry, "attention, mercury is out of retrograde today. thank god." ♪ baby you're a firework >> reporter: their on again/off again romance again began again last summer and in september were seemingly inseparable. >> in the last couple of weeks people noticed they hadn't spent much time together. >> reporter: as recently as two weeks ago, perry tweeted "my boyfriend is taking me to a kitten shelter in his truck. i can't think of a more perfect saturday." she confessed in her movie "katy perry the movie: part of me" that she longs for a partner who isn't